'Contract for Deed' requirements

[Alexander Hogarth]

Hey everyone - looking at my first owner financing deal, probably going to sign a contract for deed and can't figure out if I need to share my tax number or not with the seller? 

If they are going to pay the tax, insurance, and utilities... Will it only be needed when transferring everything after the payments are all made?

 If anyone knows more about it than me, would love to hear your thoughts